Structural characterization of zinc-modified glasses from the SiO2-P2O5-K2O-CaO-MgO system

Wacławska, I.; Szumera, Magdalena; Sułowska, Justyna

doi:10.1016/j.jallcom.2016.01.125

Cited by 33 publications

(12 citation statements)

References 39 publications

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“…Many of the studies carried out in GF are mainly related to knowledge of the effect of macro‐ and microelements on the glass structure rather than their use as GF for plants. As an example, there exist extensive bibliographic records from the group of Wacławska and Szumera, who designed GF varying the SiO 2 :P 2 O 5 :K 2 O ratio and including all microelements generally needed by plants (Ca, Na, Mg, Mo, B, Fe, Zn, etc. ), but none of these was actually applied in extensive agriculture.…”

Section: Discussionmentioning

confidence: 99%

Application of a glass fertilizer in sustainable tomato plant crops

et al. 2018

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After harvesting the tomato crops, the GF fertilizer was found to result in a higher yield than the NPK conventional fertilizer: 59980 kg and 74 360 kg for NKP and GF, respectively. The general characteristics of the harvested tomato fruits and leaves were similar in the two cases and the differences fell within statistical error. No differences in any of the soil characteristics were detected as a result of the use of GF. © 2018 Society of Chemical Industry.

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Section: Discussionmentioning

confidence: 99%

Application of a glass fertilizer in sustainable tomato plant crops

et al. 2018

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“…In recent years, there have also appeared some publications on the influence of the addition of ZnO on the structure of glasses with a mixed phosphate-silicate structure [7,34].…”

Section: Introductionmentioning

confidence: 99%

“…When it occupies the tetrahedral sites by forming ZnO 4 structural units, ZnO oxide plays the role of glass former. But, when it occupies the octahedral sites coordinated, ZnO oxide acts as glass modifier [7,25].…”

Section: Introductionmentioning

confidence: 99%

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Structural and Calorimetric Studies of Zinc, Magnesium and Manganese Based Phosphate and Phosphate-Silicate Glasses

Omrani¹,

Jemal²,

Khattech³

et al. 2020

Contemporary Topics About Phosphorus in Biology and Materials

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Glasses of the (50-x/2)Na 2 O-xMO-(50-x/2)P 2 O 5 (M = Zn, Mg or Mn) (0 ≤ x ≤ 33 mol%), (50-x)Na 2 O-xMO-50P 2 O 5 (M = Zn, Mn) (0 ≤ x ≤ 33 mol%), and (0.9-x) NaPO 3 -xSiO 2 -0.1ZnO (0 ≤ x ≤ 0.1 mol) were prepared by the melt quenching technique. Samples were investigated by means of X-ray diffraction, Archimede's method, ellipsometry, Fourier-transformed infrared (FTIR), Raman, 31P solid state magic angle spinning nuclear magnetic resonance (MAS-NMR), UV-visible spectroscopy and calorimetry. For zinc, manganese and magnesium phosphate glasses, the increase in density with the addition of MO oxide suggests the compactness of the vitreous network. For zinc phosphate silicate glasses, the variations of density and refractive index were attributed to the structural changes when SiO 2 oxide is progressively introduced. The increase in the glass transition temperature (Tg) reflects an increase in the cross-link strength of the structure as MO and SiO 2 oxides are gradually incorporated. For all glass composition, spectroscopic investigations revealed the depolymerization of metaphosphate chains (Q 2 ) allowing the formation of phosphate dimers (Q 1 ). Calorimetric dissolution shows that the dissolution is endothermic for lower MO content and become exothermic when x rises. For (50-x/2)Na 2 O-xZnO-(50-x/2)P 2 O 5 (0 ≤ x ≤ 33 mol%) glasses, the formation enthalpy increases with the incorporation of ZnO oxide.

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“…The introduction of zinc oxide ameliorates the mechanical properties of glasses and their chemical durability as the case of transition metal oxide (MO), due to the formation of the ionic cross linking P-O-M, which make them suitable for large applications such as: laser and luminescence materials [5-7, 10, 14, 19-26]. The incorporation of zinc oxide causes structural changes on the distribution of phosphate chains inducing the shortening of metaphosphate groups (Q 2 ) allowing the formation of phosphate dimmers (Q 1 ) which result the increase of number of non bridging oxygen in the vitreous network [26,27].…”

Section: Introductionmentioning

confidence: 99%

Standard Formation Enthalpy of Na2O–ZnO–P2O5 Series Glasses

2018

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100 − x)NaPO 3 -xZnO (0 ≤ x ≤ 33 mol%) phosphate glasses have been prepared using the conventional melt quenching technique. Amorphous state was checked up by X-ray diffraction. Glasses have been investigated in detail by mean of differential scanning calorimetry, inductively coupled plasma. Incorporation of ZnO oxide increases the T g value and the thermal stability of samples. For this glass series, 31 P solid state magic angle spinning nuclear magnetic resonance (MAS-NMR) spectroscopy revealed the decrease of Q 2 tetrahedral sites and the increase of phosphate dimers (Q 1 ), when ZnO oxide is progressively introduced, suggesting the shortening of metaphosphate chains. Dissolution of glasses has been followed calorimetrically and showed a change in thermal signs resulting from the depolymerization of metaphosphate groups when ZnO oxide is added. A thermochemical cycle involving a number of dissolution and mixing processes have been carried out in order to get the standard enthalpy of formation of these glasses. Calculation of these quantities needs the standard enthalpy of formation of sodium trimetaphosphate. Formation enthalpy of glasses increases with the incorporation of ZnO oxide.

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Structural characterization of zinc-modified glasses from the SiO2-P2O5-K2O-CaO-MgO system

Cited by 33 publications

References 39 publications

Application of a glass fertilizer in sustainable tomato plant crops

Application of a glass fertilizer in sustainable tomato plant crops

Structural and Calorimetric Studies of Zinc, Magnesium and Manganese Based Phosphate and Phosphate-Silicate Glasses

Standard Formation Enthalpy of Na2O–ZnO–P2O5 Series Glasses

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